:root {
  --bg-1: #ecfdf6;      /* very light mint */
  --bg-2: #e6f7fb;      /* light aqua */
  --card: #ffffff;
  --accent: #33b4a8;    /* turquoise */
  --accent-2: #1f9b8f;  /* darker turquoise */
  --text: #09363a;
  --muted: #5f7574;
  --input-border: #e6f7f5;
  --shadow: 0 10px 30px rgba(7, 46, 46, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(135deg, var(--bg-1), var(--bg-2));
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

/* Centered container */
.container {
  width: 100%;
  max-width: 720px;
  padding: 1rem;
}

/* Card look for the form */
.card {
  background: var(--card);
  border-radius: 14px;
  padding: 1.6rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(6, 57, 57, 0.03);
}

/* Headings */
h1 {
  margin: 0 0 1rem 0;
  color: var(--accent-2);
  font-weight: 600;
  letter-spacing: -0.2px;
}

/* Form */
.expense-form label {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.expense-form input,
.expense-form select,
.expense-form textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--input-border);
  background: #fbffff;
  color: var(--text);
  font-size: 1rem;
  margin-top: 0.35rem;
  transition: box-shadow 0.12s ease, border-color 0.12s ease, transform 0.08s ease;
}

.expense-form select { appearance: none; }

.expense-form textarea { resize: vertical; min-height: 72px; }

/* Focus */
.expense-form input:focus,
.expense-form select:focus,
.expense-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(51, 180, 168, 0.12);
  transform: translateY(-1px);
}

/* Actions / button */
.actions { margin-top: 0.8rem; text-align: right; }

.btn-primary {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: #fff;
  border: none;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(51,180,168,0.16);
  transition: transform 0.08s ease, box-shadow 0.12s ease, opacity 0.12s;
}

.btn-primary:hover { transform: translateY(-2px); }
.btn-primary:active { transform: translateY(0); opacity: 0.95; }

/* Responsive small tweaks */
@media (min-width: 700px) {
  .expense-form label {
    font-size: 0.95rem;
  }

  /* two-column layout for larger screens */
  .expense-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem 1rem;
    align-items: start;
  }

  /* Make full-width elements span two columns */
  .expense-form label:nth-child(1),
  .expense-form label:nth-child(2),
  .expense-form label:nth-child(3),
  .expense-form label:nth-child(4),
  .expense-form label:nth-child(10),
  .expense-form label:nth-child(11) {
    grid-column: 1 / -1;
  }

  .actions { grid-column: 1 / -1; }
}